Uptake of a Few Divalent Heavy Metal Ionic Species by a Fixed Bed of Hydroxyapatite Particles

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yasushi Takeuchi¹  Yoshitake Suzuki¹ 

[1] Department of Industrial Chemistry, Meiji University

关键词: Adsorption;    Breakthrough Curve;    Elution Curve;    Fixed Bed;    Heavy Metal Ions Removal;    Hydroxyapatite;    Ion Exchange;    Mass Transfer;   

DOI  :  10.1252/jcej.27.571

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(11)Breakthrough curves were measured for Cd2+, Cu2+ and Pb2+ in their single, binary and ternary nitrate aqueous solution systems using a fixed bed of hydroxyapatite particles in order to obtain volumetric mass transfer coefficients. Breakthrough curves for Pb2+ showed particular profiles depending on the pH of influent solutions in the bed. For the binary and ternary systems containing Pb2+, the curves for each ion showed that Pb2+ displaced not only calcium but also other co-existent ions which were already collected in the substrate. It was considered that Cd2+ and Cu2+ were collected in the vicinity of the internal surface of particles, but the uptake of Pb2+ occurred in the interior as well as at the internal surface of hydroxyapatite particles.

【 授权许可】

Unknown